Fish diurnal

Chinook Salmon

Oncorhynchus tshawytscha

The legendary 'King Salmon' is a titan of the Pacific, famous for its incredible size and the epic journey it takes from the ocean back to its mountain birthplace. Witnessing a Chinook run is like watching the heartbeat of the ecosystem in action.

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Quick Identification

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Size

Typically 60-90 cm (24-36 in) and 4.5-22.7 kg (10-50 lbs), though record specimens reach 150 cm (58 in) and 59 kg (130 lbs)

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Colors

In the ocean, they are blue-green on the back with silvery sides. Spawning adults turn olive-brown, red, or even black; males are often darker than females.

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Key Features

Black gums at the base of the teeth
Large black spots on the back and both lobes of the tail fin
Streamlined, torpedo-shaped body
Hooked snout (kype) develops in spawning males

When You’ll See Them

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Activity pattern diurnal

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Peak hours 6-10 AM and 4-8 PM

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Season August-October (Fall Run) and April-June (Spring Run)

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Diet Juveniles in freshwater feed on plankton and aquatic insects. Adults in the ocean are carnivores, hunting herring, squid, and crustaceans.

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Habitat Deep, cool river pools and gravel-bottomed streams for spawning; coastal and open ocean waters for maturing.

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Behavior

Chinook Salmon are anadromous, meaning they begin their lives in freshwater streams, migrate to the vast Pacific Ocean to mature, and eventually return to their natal rivers to spawn and die. This lifecycle is one of nature's most grueling endurance tests, as they often travel hundreds of miles inland, leaping over waterfalls and fighting strong currents without eating once they enter freshwater.

As the largest of the Pacific salmon, they are often solitary in the ocean but congregate in large numbers during 'runs' in the spring and fall. While they are generally wary of humans, they are a central figure in Pacific Northwest culture and ecology, providing a vital nutrient source for bears, eagles, and even the surrounding forest soil after they spawn.

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Camera Tips

Capturing Chinook Salmon on a backyard or trail camera is a unique challenge because it usually requires an underwater setup or a camera positioned perfectly over a shallow stream. If your property has a creek or river access, look for 'redds'—bright, clean patches of gravel where females have cleared away algae to lay eggs. Position your camera on a bank or a sturdy overhanging branch looking down at these gravel beds at a 45-degree angle. This is where the most action occurs, as you will see males competing for the female's attention.

Since water creates significant glare, using a circular polarizer lens filter on your camera housing is essential to see beneath the surface. If you are using a standard trail camera above water, try to capture the 'jump.' Set your camera to 'Burst Mode' or high-speed video (60fps or higher) to catch them as they leap over rocks or small falls. Salmon are most likely to move upstream during the early morning or late evening when the light is low, so ensure your camera has a fast trigger speed to handle the movement in dim conditions.

For those with waterproof 'action' cameras or dedicated underwater trail cams, mount the device to a weighted base or a heavy rock in a pool just downstream from a riffle. This is where salmon often rest before their next big push upstream. Avoid using bright white lights at night as this can spook the fish; instead, rely on high-sensitivity sensors or natural light during the peak morning hours. Seasonal timing is everything—check with your local fish and wildlife department for 'run' dates to ensure your camera is deployed exactly when the fish arrive.

Similar Species

Species that look similar or are commonly confused with Chinook Salmon.

Coho Salmon

Coho have white gums and spots only on the top half of their tail, whereas Chinook have black gums and fully spotted tails.

Steelhead Trout

Steelhead are more slender and have white mouths; unlike Chinook, they can survive spawning and return to the ocean multiple times.

Frequently Asked Questions

Chinook Salmon are primarily diurnal and are most active during the early morning and late afternoon. In rivers, their movement is often triggered by changes in light levels or rising water levels following rain.

You cannot 'attract' salmon with bait in the traditional sense, as they stop eating once they enter freshwater to spawn. The best way to see them is to maintain a healthy riparian zone with native plants and cool, clean water if you have a stream on your property.

In their ocean phase, they eat smaller fish like herring and pilchards, along with squid and shrimp. Once they return to freshwater rivers to spawn, they cease feeding entirely and live off stored fat reserves.

Yes, in the Pacific Northwest and Great Lakes regions, Chinook Salmon often run through suburban creeks and rivers that connect to the ocean or large lakes, provided the water is cool and well-oxygenated.

The easiest way is to look at the mouth: Chinook have black gums at the base of their teeth, whereas Coho have white gums. Additionally, Chinook have spots across the entire tail fin, while Coho usually only have spots on the upper half.

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